Seagate ST33000651SS Constellation ES SATA Product Manual - Page 27

Annualized Failure Rate AFR and Mean Time Between Failures MTBF

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3.13 Reliability 3.13.1 Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF) The product shall achieve an Annualized Failure Rate (AFR) of 0.73% (MTBF of 1.2 million hours) when operated nominal power and typical case temperatures of 40°C. Operation at temperatures outside the specifications in Section 3.9 may increase the product AFR (decrease MTBF). AFR and MTBF are population statistics that are not relevant to individual units. AFR and MTBF specifications are based on the following assumptions for business critical storage system environments: • 8,760 power-on-hours per year. • Operations at nominal voltages. • Temperatures outside the specifications in Section 3.9 may reduce thee product reliability. • Normal I/O duty cycle for enterprise nearline applications. Operation at excessive I/O duty cycle may degrade product reliability. The enterprise application nearline environment of power-on-hours, temperature, and I/O duty cycle affect the product AFR and MTBF. Nonrecoverable read errors Annualized Failure Rate (AFR) Load unload cycles Warranty 1 per 1015 bits read, max 0.73% (nominal power, 40°C case temperature) 300,000 cycles To determine the warranty for a specific drive, use a web browser to access the following web page: support.seagate.com/customer/warranty_validation.jsp Preventive maintenance From this page, click on the "Verify Your Warranty" link. You will be asked to provide the drive serial number, model number (or part number) and country of purchase.The system will display the warranty information for your drive. None required. Constellation ES Serial ATA Product Manual, Rev. G 21

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Constellation ES Serial ATA Product Manual, Rev. G
21
3.13
Reliability
3.13.1
Annualized Failure Rate (AFR) and Mean Time Between Failures (MTBF)
The product shall achieve an Annualized Failure Rate (AFR) of 0.73% (MTBF of 1.2 million hours) when oper-
ated nominal power and typical case temperatures of 40°C. Operation at temperatures outside the specifica-
tions in Section 3.9 may increase the product AFR (decrease MTBF). AFR and MTBF are population statistics
that are not relevant to individual units.
AFR and MTBF specifications are based on the following assumptions for business critical storage system
environments:
•
8,760 power-on-hours per year.
•
Operations at nominal voltages.
•
Temperatures outside the specifications in Section 3.9 may reduce thee product reliability.
•
Normal I/O duty cycle for enterprise nearline applications. Operation at excessive I/O duty cycle may
degrade product reliability.
The enterprise application nearline environment of power-on-hours, temperature, and I/O duty cycle affect the
product AFR and MTBF.
Nonrecoverable read errors
1 per 10
15
bits read, max
Annualized Failure Rate (AFR)
0.73% (nominal power, 40°C case temperature)
Load unload cycles
300,000 cycles
Warranty
To determine the warranty for a specific drive, use a web browser to access the
following web page:
support.sea
gate.com/customer/warranty_validation.jsp
From this page, click on the "Verify Your Warranty" link. You will be asked to provide
the drive serial number, model number (or part number) and country of purchase.The
system will display the warranty information for your drive.
Preventive maintenance
None required.